Polishing and filing attachment for lathes



(No Model.) I G. TESKE.

. POLISHING AND FILING ATTACHMENT FOR LATHES. No. 516,779. Patented Mar.20, 1894.

UNITED STATES PATENT ()rEIcE.

CHARLES TESKE, OF SPRINGFIELD, MASSACHUSETTS.

POLISHING AND FILING ATTACHMENT FOR LATHES.

SPECIFICATION forming part of Letters Patent No. 516,779, dated March20, 1894. Application filedJune 16, 1893. Serial No. 477,805. (Nomodel.)

\ To all whom it may concern:

Be it known that 1, CHARLES TESKE, acitizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented certain new and useful Improvements inPolishing and Filing Attachments for Lathes, ing is a specification.

My invention relates to improvements in polishing and filing attachmentsfor lathes, and the object of my improvement'is to furnish convenientattachments for lathes by means of which polishing and filing can berapidly and accurately done.

In the accompanying drawings: Fignrel is a side elevation of a lathewith my polishing attachment applied thereto. Fig. 2 is a side elevationof said attachment together with a balance wheel in the position whichit would occupy when held by the lathe chuck. Fig. 3 is a like view ofsaid polishing attachment with my filing attachment applied theretotogether with a partially finished screw head in the position that itwould occupy when held in the lathe. Fig. 4 is a rear elevation of theattachments shown in Fig. 3, and Fig. 5 is a side elevation of mypolishing attachment in a slightly modified form.

I have represented my attachment as applied to a watchmakers lathe forwatchmakers use, but it may also be applied to other lathes for the useof other artisans if desired.

A designates the bed of the lathe, 13 its head block provided with anyordinary spindle 0.

My polishing attachment consists of a standard 5 having a base 6 that isfitted to the lathe bed and designed to be held thereon in any suitablemanner, as for example by means of the shoe or slide 7, bolt 8 and not9, the same being the parts that are used for holding the ordinary toolcarriage or rest upon the lathe. At the upper part of the standard 5 isa guide 10 which is preferably in the form of a ring arranged at suchheight on the standard that when the standard is attached to, the lathebed as shown, the ring will be concentric with the lathe spindle and itsfront face at right angles to the axis of the spindle. I make this guideof a size large enough to receive within it the parts that are to beoperated upon. The standards may of which the followbe made withdifferent sized rings or guides if desired. I also provide the standard5 with an adjusting screw 11 which is designed to extend through thestandard 5 to the face of the head block B. I prefer to bevel off onecorner of the guide 10 as at 12, Figs. 2, 3 and 4.

For the purpose of grinding and polishing only, the standard asdescribed is complete, but for the purpose of providing a filingattachment, I provide the guide 10 with a lug 13 having a screw hole 14,Fig. 2, for receiving a fastening screw and a radial hole (not shown)for receiving an adjusting screw for radially adjusting the filingattachment. The filing attachment 13 consists of a segmental platehaving a notch 14 for receiving the body of the fastening screw 15 whichpasses into the hole 14: to secure the filing attachment in place. Thisfiling attachment is also provided with a lateral arm or lug 16 whichengages the grooved neck of the radial adjusting screw 17 which passesinto the radial hole of the lug 14 before described.

My attachment may be used in various ways and for dilferent purposes, afew of which I will proceed to describe. For grinding or polishing apivot or the head of a screw, the standard will be fixed squarely on thelathe bed as shown in Fig. 1. The work to be polished will be secured inthe lathe chuck in the ordinary manner. If it is not projected theproper distance from the face of the guide 10, the head block may beloosened and moved along until the work is properly positioned withreference to the face of the guide 10 when the head block will be againsecured in place. In Fig. 2 I have represented a balance wheel 18 of awatch in the position that it would occupy, if held in the lathespindle. A straight edge may be applied across-the face of the guide 10to ascertain if the pivot projects the proper distance. If not, the adjusting set screw 11 may be turned in until it strikes the end of thehead block and then upon loosening the head block or the standard thescrew may be turned out or in to properly adjust the work to the face ofthe guide. By the employment of the screw 11 this adjustment can be madeto a great nicety. For polishing pivots or other cylindrical parts aright angular grinder or polisher of any suitable material can be placedwith one face squarely against the face of the guide10, while the ICOface of the polisher which is at right angles thereto is held againstthe pivot of the balance wheel and the polisher moved back and forth asthe work is revolved and other polishers substituted therefor from timeto time until the work is complete. This will not only polish the workaccurately but the guide serves as a protector or guard to enable thepolisher to be used up to any desired point without coming in contactwith or injuring any other part. Thus the pivot of a wheel may bepolished closely up to its shoulder without marring or otherwiseinjuring the face of the wheel or parts attached thereto. For polishingthe face or end of a piece, as

for example the top of a screw head,the parts are adjusted inthesamemanner and the face of the polisher that is parallel to the faceof the guide will be used instead of the face that stands at an anglethereto. For polishing a pointed head or a beveled corner of a head, asfor instance of a screw, the screw may be held in the chuck so as toproject a proper distance beyond the face of the guide 10- and thepolisher drawn back and forth while resting upon the head of the screwat one part and upon the beveled face 12 at another part.

My filing attachment is designed for squaring angular articles, as forinstance a screw head or winding arbor. The screw head blank 19 which isrepresented in proper position in Fig. 3 as if held in the chuck, may beadjusted so as to project properly beyond the face of the guide 10 andthe lathe spindle fastened against rotation by any suitable means, as,for example, by means of the index pin 20 which may take into one of theholes of the division plate which is usually formed on the pulley of thelathe spindle. A file is then placed with one edge against the face ofthe guide 10 and its flat side in front of the ends of the filingattachment 13 and the screw head filed down until it is brought intoalignment with the end faces of the filing attachment. If the screw headis to be square the index pin 20 is removed, the lathe spindle turned aquarter of the revolution and again secured in place and another facefiled off in the manner before described and so on until all the facesare squared. If a-. hexagonal head is desired, the lathe spindle wouldbe moved acorrespondin g distance after filing each face. If it is foundthat the screw head when filed deeper face after which the fasteningscrew will be again tightened and the various faces dressed down to formfull sharp corners on the screw head or other article squared. It is ofcourse evident that the ring and filing attachment may have theirwearing faces properly hardened. If desired the guide may be recessed ontwo opposite sides and hard rollers 21 inserted therein on any suitableand durable bearings, the rollers serving as the bearing faces of theguide, or in lieu of rollers any very hard blocks may be inserted in therecesses to serve as guiding faces.

I claim as my invention- 1. The herein described polishing attachmentconsisting of the standard adaptedto be clamped to the lathe bed, theguide 10 at. the upper end of said standard and the adjusting set. screw11 arranged within said standard for projecting its end against the endof the head block, substantially as described and for the purposespecified.

2. The herein described polishing and filing attachment to the latheconsisting of the standard 5 andguide 10 adapted to be secured upon thelathe bed and the filing attachment adapted to be secured to the face ofsaid. guide for gaging the depth of the faces filed, substantially asdescribed and for the purpose specified.

3. Theherein described polishing and filing attachment consisting of thestandard 5, the

guide 10, the filing attach-mentsecured tosaid- CHARLES TESKE.

Witnesses:

FREDERICK N. TAYLOR, FREDRICK O. CrrInsEY.

